EP 3760894 A1 20210106 - FLUID DAMPER AND DRIVING TOOL
Title (en)
FLUID DAMPER AND DRIVING TOOL
Title (de)
FLUIDDÄMPFER UND SCHRAUBWERKZEUG
Title (fr)
AMORTISSEUR À HUILE ET OUTIL D'ENTRAÎNEMENT
Publication
Application
Priority
- JP 2018036896 A 20180301
- JP 2019007712 W 20190227
Abstract (en)
A oil damper (91) includes a cylinder tube (93a) portion which is filled with an oil, a piston (93b) which is provided so as to be movable in an inner portion of the cylinder tube portion (93a) and whose moving speed is controlled with resistance of the oil, a spring (93g) which expands and contracts in accordance with a position of the piston (93b) and which applies a force corresponding to an expansion and contraction amount of the spring to the piston, and a first bypass flow path (93ii) that reduces a load at the time the piston (93b) moves by increasing an area of a flow path through which the fluid passes in accordance with a position of the piston (93b) and by changing a resistance of the oil at a time the piston (93b) moves in accordance with a change of a force applied to the piston (93b) by the spring (93g).
IPC 8 full level
F16F 9/48 (2006.01); B25C 7/00 (2006.01); F16F 9/32 (2006.01)
CPC (source: EP US)
B25C 1/008 (2013.01 - EP US); B25C 1/043 (2013.01 - EP); B25C 1/047 (2013.01 - EP US); F16F 9/483 (2013.01 - EP); F16F 9/19 (2013.01 - EP); F16F 9/3235 (2013.01 - EP)
Designated contracting state (EPC)
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
Designated extension state (EPC)
BA ME
DOCDB simple family (publication)
EP 3760894 A1 20210106; EP 3760894 A4 20211208; JP 7222389 B2 20230215; JP WO2019168075 A1 20210304; US 11590639 B2 20230228; US 2020391365 A1 20201217; WO 2019168075 A1 20190906
DOCDB simple family (application)
EP 19760964 A 20190227; JP 2019007712 W 20190227; JP 2020503597 A 20190227; US 201916975348 A 20190227